summaryrefslogtreecommitdiff
path: root/boost/geometry/algorithms/detail/disjoint/point_point.hpp
blob: 7580b7287b0b004904e850d9845e12d7e77720b6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
// Boost.Geometry (aka GGL, Generic Geometry Library)

// Copyright (c) 2007-2015 Barend Gehrels, Amsterdam, the Netherlands.
// Copyright (c) 2008-2015 Bruno Lalande, Paris, France.
// Copyright (c) 2009-2015 Mateusz Loskot, London, UK.
// Copyright (c) 2013-2015 Adam Wulkiewicz, Lodz, Poland

// This file was modified by Oracle on 2013, 2014, 2015.
// Modifications copyright (c) 2013-2015, Oracle and/or its affiliates.

// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle

// Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
// (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.

// Use, modification and distribution is subject to the Boost Software License,
// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)

#ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_DISJOINT_POINT_POINT_HPP
#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_DISJOINT_POINT_POINT_HPP

#include <cstddef>

#include <boost/type_traits/is_same.hpp>

#include <boost/geometry/core/access.hpp>
#include <boost/geometry/core/radian_access.hpp>
#include <boost/geometry/core/coordinate_dimension.hpp>
#include <boost/geometry/core/coordinate_system.hpp>
#include <boost/geometry/core/coordinate_type.hpp>
#include <boost/geometry/core/cs.hpp>
#include <boost/geometry/core/tags.hpp>

#include <boost/geometry/util/math.hpp>
#include <boost/geometry/util/select_most_precise.hpp>

#include <boost/geometry/strategies/strategy_transform.hpp>

#include <boost/geometry/geometries/helper_geometry.hpp>

#include <boost/geometry/algorithms/transform.hpp>

#include <boost/geometry/algorithms/detail/normalize.hpp>

#include <boost/geometry/algorithms/dispatch/disjoint.hpp>


namespace boost { namespace geometry
{


#ifndef DOXYGEN_NO_DETAIL
namespace detail { namespace disjoint
{


template <std::size_t Dimension, std::size_t DimensionCount>
struct point_point_generic
{
    template <typename Point1, typename Point2>
    static inline bool apply(Point1 const& p1, Point2 const& p2)
    {
        if (! geometry::math::equals(get<Dimension>(p1), get<Dimension>(p2)))
        {
            return true;
        }
        return
            point_point_generic<Dimension + 1, DimensionCount>::apply(p1, p2);
    }
};

template <std::size_t DimensionCount>
struct point_point_generic<DimensionCount, DimensionCount>
{
    template <typename Point1, typename Point2>
    static inline bool apply(Point1 const&, Point2 const&)
    {
        return false;
    }
};


class point_point_on_spheroid
{
private:
    template <typename Point1, typename Point2, bool SameUnits>
    struct are_same_points
    {
        static inline bool apply(Point1 const& point1, Point2 const& point2)
        {
            typedef typename helper_geometry<Point1>::type helper_point_type1;
            typedef typename helper_geometry<Point2>::type helper_point_type2;

            helper_point_type1 point1_normalized
                = return_normalized<helper_point_type1>(point1);
            helper_point_type2 point2_normalized
                = return_normalized<helper_point_type2>(point2);

            return point_point_generic
                <
                    0, dimension<Point1>::value
                >::apply(point1_normalized, point2_normalized);
        }
    };

    template <typename Point1, typename Point2>
    struct are_same_points<Point1, Point2, false> // points have different units
    {
        static inline bool apply(Point1 const& point1, Point2 const& point2)
        {
            typedef typename geometry::select_most_precise
                <
                    typename fp_coordinate_type<Point1>::type,
                    typename fp_coordinate_type<Point2>::type
                >::type calculation_type;

            typename helper_geometry
                <
                    Point1, calculation_type, radian
                >::type helper_point1, helper_point2;

            Point1 point1_normalized = return_normalized<Point1>(point1);
            Point2 point2_normalized = return_normalized<Point2>(point2);

            geometry::transform(point1_normalized, helper_point1);
            geometry::transform(point2_normalized, helper_point2);

            return point_point_generic
                <
                    0, dimension<Point1>::value
                >::apply(helper_point1, helper_point2);
        }
    };

public:
    template <typename Point1, typename Point2>
    static inline bool apply(Point1 const& point1, Point2 const& point2)
    {
        return are_same_points
            <
                Point1,
                Point2,
                boost::is_same
                    <
                        typename coordinate_system<Point1>::type::units,
                        typename coordinate_system<Point2>::type::units
                    >::value
            >::apply(point1, point2);
    }
};


template
<
    typename Point1, typename Point2,
    std::size_t Dimension, std::size_t DimensionCount,
    typename CSTag1 = typename cs_tag<Point1>::type,
    typename CSTag2 = CSTag1
>
struct point_point
    : point_point<Point1, Point2, Dimension, DimensionCount, cartesian_tag>
{};

template
<
    typename Point1, typename Point2,
    std::size_t Dimension, std::size_t DimensionCount
>
struct point_point
    <
        Point1, Point2, Dimension, DimensionCount, spherical_equatorial_tag
    > : point_point_on_spheroid
{};

template
<
    typename Point1, typename Point2,
    std::size_t Dimension, std::size_t DimensionCount
>
struct point_point
    <
        Point1, Point2, Dimension, DimensionCount, geographic_tag
    > : point_point_on_spheroid
{};

template
<
    typename Point1, typename Point2,
    std::size_t Dimension, std::size_t DimensionCount
>
struct point_point<Point1, Point2, Dimension, DimensionCount, cartesian_tag>
    : point_point_generic<Dimension, DimensionCount>
{};


/*!
    \brief Internal utility function to detect of points are disjoint
    \note To avoid circular references
 */
template <typename Point1, typename Point2>
inline bool disjoint_point_point(Point1 const& point1, Point2 const& point2)
{
    return point_point
        <
            Point1, Point2,
            0, dimension<Point1>::type::value
        >::apply(point1, point2);
}


}} // namespace detail::disjoint
#endif // DOXYGEN_NO_DETAIL




#ifndef DOXYGEN_NO_DISPATCH
namespace dispatch
{


template <typename Point1, typename Point2, std::size_t DimensionCount>
struct disjoint<Point1, Point2, DimensionCount, point_tag, point_tag, false>
    : detail::disjoint::point_point<Point1, Point2, 0, DimensionCount>
{};


} // namespace dispatch
#endif // DOXYGEN_NO_DISPATCH

}} // namespace boost::geometry

#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_DISJOINT_POINT_POINT_HPP